IC83723: MQ V7.1: QUEUE MANAGER ABNORMALLY TERMINATES WITH PROBE ID XC130031 WHEN ACTIVITY TRACE IS ENABLED.

WebSphere MQ V7.5 Fix Pack 7.5.0.1
Fix Pack 7.1.0.3 for WebSphere MQ V7.1

APAR status

• Closed as program error.

Error description

• The queue manager abnormally terminates while an application
  attempts to connect to a queue. The queue manager has activity
  trace (ACTVTRC) set to ON.
  
  The initial FDC shows the following:
  Probe Id          :- XC130031
  Component         :- xehExceptionHandler
  Process Name      :- C:\Program Files\IBM\WebSphere MQ\bin
  \amqzlaa0.exe
  Comment1          :- Access Violation at address 00000114 when
  reading
  MQM Function Stack
  zlaMainThread
  zlaProcessMessage
  zlaProcessMQIRequest
  zlaMQCB
  zsqMQCB
  zsqATCBAfter
  xcsFFST
  
  An FDC is then cut with Probe Id ZX005035 reporting the agent
  process (amqzlaa0.exe) has terminated unexpectedly.
  
  FDCs may show the following Probe Ids:
  ZX092017 XC589160 ZL043050 ZL043050 ZL043105 ZX103020 ZX118016
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users who use activity tracing may be affected by this problem
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  WebSphere MQ activity tracing code was incorrectly dereferencing
  a null pointer causing the FDC.
  

Problem conclusion

• The code logic was changed so that it would first check whether
  the variable contained a null pointer before trying to
  dereference it.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.1
  Platform           Fix Pack 7.1.0.3
  --------           --------------------
  Windows            7.1.0.3
  AIX                7.1.0.3
  HP-UX (Itanium)    7.1.0.3
  Solaris (SPARC)    7.1.0.3
  Solaris (x86-64)   7.1.0.3
  iSeries            7.1.0.3
  Linux (x86)        7.1.0.3
  Linux (x86-64)     7.1.0.3
  Linux (zSeries)    7.1.0.3
  Linux (Power)      7.1.0.3
  
  Platform           v7.5
  --------           --------------------
  Multiplatforms     7.5.0.1
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R710 PSY

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